Hello,
I have a Bluetooth dongle from MSI with a Cambridge Silicon Radio, Ltd
chip. I noticed these messages flashing by when I plugged it in:
Apr 2 16:07:42 section_eight usb 2-3: new full speed USB device using
ohci_hcd and address 5
Apr 2 16:07:42 section_eight usb 2-3: device descriptor read/64,
error -62
Apr 2 16:07:42 section_eight usb 2-3: configuration #1 chosen from 1
choice
Apr 2 16:07:43 section_eight hcid[5733]: Bluetooth HCI daemon
Apr 2 16:07:43 section_eight hcid[5733]: HCI dev 0 up
Apr 2 16:07:43 section_eight hcid[5733]: Starting security manager 0
Apr 2 16:07:43 section_eight sdpd[5744]: Bluetooth SDP daemon
The device does work fine, though. Anyway, I tried to narrow the issue
down. It turns out that this seems to be related to CONFIG_HZ. With
CONFIG_HZ=100 I never see the "device descriptor read/64, error -62"
line. With CONFIG_HZ=1000 is get it almost all the time.
I tried to narrow it down to a change in the code. I thought about
finding a kernel version where this doesn't happen with CONFIG_HZ=1000
and doing a git bisection. But I took me quite a lot of time and I
didn't find anything useful. I was able to reproduce this with all the
kernels I tested. 2.6.19, 2.6.20 and 2.6.21 up to -rc5. As I already
said it took me a lot of time and I couldn't find a kernel that didn't
have the read errors with CONFIG_HZ=1000. I don't have the time (nor
the nerves) to check every kernel that features CONFIG_HZ=1000.
I don't know if this is of interest at all because the device works
anyway. I just wanted to get this off my chest because I spend so much
time trying to figure it out.
If there's anything I can do just tell me.
Regards
Sebastian
P.S.:
lspci -v
00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?)
(rev c1)
Flags: bus master, 66MHz, fast devsel, latency 0
Memory at e0000000 (32-bit, prefetchable) [size=32M]
Capabilities: [40] AGP version 3.0
Capabilities: [60] HyperTransport: Host or Secondary Interface
00:00.1 RAM memory: nVidia Corporation nForce2 Memory Controller 1 (rev
c1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel
00:00.2 RAM memory: nVidia Corporation nForce2 Memory Controller 4 (rev
c1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel
00:00.3 RAM memory: nVidia Corporation nForce2 Memory Controller 3 (rev
c1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel
00:00.4 RAM memory: nVidia Corporation nForce2 Memory Controller 2 (rev
c1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel
00:00.5 RAM memory: nVidia Corporation nForce2 Memory Controller 5 (rev
c1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel
00:01.0 ISA bridge: nVidia Corporation nForce2 ISA Bridge (rev a4)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0
Capabilities: [48] HyperTransport: Slave or Primary Interface
00:01.1 SMBus: nVidia Corporation nForce2 SMBus (MCP) (rev a2)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: 66MHz, fast devsel, IRQ 10
I/O ports at e800 [size=32]
Capabilities: [44] Power Management version 2
00:02.0 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 10 [OHCI])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
Memory at e5002000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2
00:02.1 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 10 [OHCI])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
Memory at e5003000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2
00:02.2 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 20 [EHCI])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18
Memory at e5004000 (32-bit, non-prefetchable) [size=256]
Capabilities: [44] Debug port
Capabilities: [80] Power Management version 2
00:04.0 Ethernet controller: nVidia Corporation nForce2 Ethernet
Controller (rev a1)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
Memory at e5000000 (32-bit, non-prefetchable) [size=4K]
I/O ports at ec00 [size=8]
Capabilities: [44] Power Management version 2
00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge (rev
a3) (prog-if 00 [Normal decode])
Flags: bus master, 66MHz, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: e4000000-e4ffffff
00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2) (prog-if
8a [Master SecP PriP])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown
device 0531
Flags: bus master, 66MHz, fast devsel, latency 0
[virtual] Memory at 000001f0 (32-bit, non-prefetchable)
[disabled] [size=8]
[virtual] Memory at 000003f0 (type 3, non-prefetchable)
[disabled] [size=1]
[virtual] Memory at 00000170 (32-bit, non-prefetchable)
[disabled] [size=8]
[virtual] Memory at 00000370 (type 3, non-prefetchable)
[disabled] [size=1]
I/O ports at f000 [size=16]
Capabilities: [44] Power Management version 2
00:1e.0 PCI bridge: nVidia Corporation nForce2 AGP (rev c1) (prog-if 00
[Normal decode])
Flags: bus master, 66MHz, medium devsel, latency 32
Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: e2000000-e3ffffff
Prefetchable memory behind bridge: d0000000-dfffffff
01:04.0 Multimedia audio controller: VIA Technologies Inc. ICE1712
[Envy24] PCI Multi-Channel I/O Controller (rev 02)
Subsystem: VIA Technologies Inc. M-Audio Delta Audiophile
Flags: bus master, medium devsel, latency 32, IRQ 20
I/O ports at c000 [size=32]
I/O ports at c400 [size=16]
I/O ports at c800 [size=16]
I/O ports at cc00 [size=64]
Capabilities: [80] Power Management version 1
01:09.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
Subsystem: Technotrend Systemtechnik GmbH
Siemens/Technotrend/Hauppauge DVB card rev1.3 or rev1.5
Flags: bus master, medium devsel, latency 128, IRQ 21
Memory at e4000000 (32-bit, non-prefetchable) [size=512]
02:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon
9200 PRO] (rev 01) (prog-if 00 [VGA])
Subsystem: Connect Components Ltd Unknown device 2801
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
Memory at d0000000 (32-bit, prefetchable) [size=256M]
I/O ports at d000 [size=256]
Memory at e3000000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at e2000000 [disabled] [size=128K]
Capabilities: [58] AGP version 3.0
Capabilities: [50] Power Management version 2
Output of lsusb -v:
Bus 001 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.21-rc5 ehci_hcd
iProduct 2 EHCI Host Controller
iSerial 1 0000:00:02.2
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 12
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 6
wHubCharacteristic 0x000a
No power switching (usb 1.0)
Per-port overcurrent protection
TT think time 8 FS bits
bPwrOn2PwrGood 10 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0xec
PortPwrCtrlMask 0x38
Hub Port Status:
Port 1: 0000.0100 power
Port 2: 0000.0100 power
Port 3: 0000.0100 power
Port 4: 0000.0100 power
Port 5: 0000.0100 power
Port 6: 0000.0100 power
Bus 003 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth
Dongle (HCI mode)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 224 Wireless
bDeviceSubClass 1 Radio Frequency
bDeviceProtocol 1 Bluetooth
bMaxPacketSize0 64
idVendor 0x0a12 Cambridge Silicon Radio, Ltd
idProduct 0x0001 Bluetooth Dongle (HCI mode)
bcdDevice 19.58
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 177
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0009 1x 9 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0009 1x 9 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0011 1x 17 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0011 1x 17 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0019 1x 25 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0019 1x 25 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0021 1x 33 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0021 1x 33 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 5
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0031 1x 49 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0031 1x 49 bytes
bInterval 1
Bus 003 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 64
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.21-rc5 ohci_hcd
iProduct 2 OHCI Host Controller
iSerial 1 0000:00:02.1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 255
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 3
wHubCharacteristic 0x0002
No power switching (usb 1.0)
Ganged overcurrent protection
bPwrOn2PwrGood 1 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0xec
PortPwrCtrlMask 0x38
Hub Port Status:
Port 1: 0000.0303 lowspeed power enable connect
Port 2: 0000.0103 power enable connect
Port 3: 0000.0103 power enable connect
Bus 003 Device 003: ID 03f0:6104 Hewlett-Packard DeskJet 5650c
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x03f0 Hewlett-Packard
idProduct 0x6104 DeskJet 5650c
bcdDevice 1.00
iManufacturer 1 hp
iProduct 2 deskjet 5600
iSerial 3 MY48C4N30G89
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 7 Printer
bInterfaceSubClass 1 Printer
bInterfaceProtocol 2 Bidirectional
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Bus 003 Device 002: ID 046d:c03e Logitech, Inc. Premium Optical Wheel
Mouse
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046d Logitech, Inc.
idProduct 0xc03e Premium Optical Wheel Mouse
bcdDevice 20.00
iManufacturer 1 Logitech
iProduct 2 USB-PS/2 Optical Mouse
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
Remote Wakeup
MaxPower 98mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 2 Mouse
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 50
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 10
Bus 002 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 64
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.21-rc5 ohci_hcd
iProduct 2 OHCI Host Controller
iSerial 1 0000:00:02.0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 255
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 3
wHubCharacteristic 0x0002
No power switching (usb 1.0)
Ganged overcurrent protection
bPwrOn2PwrGood 1 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0xec
PortPwrCtrlMask 0x38
Hub Port Status:
Port 1: 0000.0303 lowspeed power enable connect
Port 2: 0000.0100 power
Port 3: 0000.0100 power
Bus 002 Device 002: ID 046d:c30e Logitech, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046d Logitech, Inc.
idProduct 0xc30e
bcdDevice 1.80
iManufacturer 1 Logitech
iProduct 2 HID compliant keyboard
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 59
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 62
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 107
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
-------------------------------------------------------------------------
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